Figure 4.

SARS-CoV-2 RNA copies/ml in the samples from upper respiratory tract. Viral load courses (individual courses and mean courses of children and adults), shown from the day of assumed infection (day zero) onwards. Dotted line marks 10^6 RNA copies/ml as threshold for infectivity (>=10^6 RNA copies/ml denotes infectious range); dashed line marks threshold for positivity with values >=10^1 RNA copies/ml considered as positive. Analysis restricted to samples considered positive (102 samples in 40 children, 214 samples in 67 adults) with increasingly fewer samples in the progression of the course of infection.